A constant f/2.8 aperture across the 15-35mm zoom range pairs with a 5-stop Image Stabilizer for sharp handheld shooting in low light. The Nano USM autofocus is fast and silent, while Air-Sphere and Fluorine coatings protect the advanced 16-element optical design from flare and moisture. This lens is best for landscape photographers who need edge-to-edge sharpness and robust weather sealing in challenging outdoor conditions.
